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Method for removing ink marks on paper by laser

An ink and paper technology, applied in the field of paper recycling, can solve problems such as energy loss, paper surface damage, and impact on the reuse of recycled paper, and achieve the effect of fast scanning and fast ink removal

Active Publication Date: 2020-06-02
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the colored ink (such as red and yellow) will reflect the light beam and cause energy loss, it is difficult for the laser to remove the colored ink completely and effectively, and it will still leave a faint ink mark on the paper after processing. Multiple laser scans cannot Solve this problem and may cause damage to the surface of the paper, affecting the reuse of recycled paper

Method used

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  • Method for removing ink marks on paper by laser
  • Method for removing ink marks on paper by laser
  • Method for removing ink marks on paper by laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] In this embodiment, taking coated printing paper with ink marks of various colors as an example, the method for removing ink marks on paper by laser is illustrated, and the specific implementation is carried out as follows:

[0068] Step 1. Ink area division

[0069] Each ink mark on the coated printing paper is divided according to the occupied length and width to form each ink mark area that is rectangular, and the length and width of the rectangle are parallel to the border of the paper;

[0070] Classify each rectangular ink area according to black / non-black, and divide it into black ink area and non-black ink area;

[0071] Step 2. Print coverage of non-black ink areas

[0072] Use the printer to print the non-black ink area, covering a layer of ink, and the color of the covered ink is black;

[0073] Step 3. Laser Removal of Ink Marks

[0074] Using the pulsed laser as the laser beam emission source, the laser scanning galvanometer system is used to deflect the...

Embodiment 2

[0078] This embodiment still takes the coated printing paper with ink marks of various colors as an example, and illustrates the method of removing paper ink marks by laser, and the specific implementation is carried out according to the following steps:

[0079] Step 1. Ink area division

[0080] Each ink mark on the coated printing paper is divided according to the occupied length and width to form each ink mark area that is rectangular, and the length and width of the rectangle are parallel to the border of the paper;

[0081] Classify each rectangular ink area according to black / non-black, and divide it into black ink area and non-black ink area;

[0082] Step 2. Print coverage of non-black ink areas

[0083] Use the printer to print the non-black ink area, covering a layer of ink, and the color of the covered ink is brown;

[0084] Step 3. Laser Removal of Ink Marks

[0085] Using the pulsed laser as the laser beam emission source, the laser scanning galvanometer syste...

Embodiment 3

[0089] This embodiment still takes the coated printing paper with ink marks of various colors as an example, and illustrates the method of removing paper ink marks by laser, and the specific implementation is carried out according to the following steps:

[0090] Step 1. Ink area division

[0091] Each ink mark on the coated printing paper is divided into areas with the outline of the ink mark as the boundary, and the area in the boundary is used as the corresponding ink mark area;

[0092] Classify each ink area according to black / non-black, and divide it into black ink area and non-black ink area;

[0093] Step 2. Print coverage of non-black ink areas

[0094] Use the printer to print the non-black ink area, covering a layer of ink, and the color of the covered ink is reddish brown;

[0095] Step 3. Laser Removal of Ink Marks

[0096] Using the pulsed laser as the source of the laser beam, the laser scanning galvanometer system is used to deflect the laser beam emitted by...

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Abstract

The invention provides a method for removing ink marks on a paper by laser. The method comprises the following steps of 1, dividing ink mark areas, specifically, dividing the ink marks on the surfaceof the paper into black ink mark areas and non-black ink mark areas; 2, printing and covering the non-black ink mark areas, specifically, printing the non-black ink mark areas by adopting a printer, and covering a layer of black ink marks; and 3, laser removing of the ink marks, specifically, irradiating laser beams emitted by a pulse laser onto the surface of the paper, setting various working parameters of the pulse laser, planning corresponding scanning paths of laser spots on various ink mark areas on the surface of the paper, sequentially scanning and filling the ink mark areas of the laser spots on the surface of the paper along the corresponding scanning paths respectively, and repeatedly scanning for N times until the ink marks of all the ink mark areas on the surface of the paperare removed. According to the method, the ablation removal of paper ink marks is realized by utilizing the high energy density and low heat effect of laser, so that the recycling of the paper is realized.

Description

technical field [0001] The invention relates to the field of paper recycling, in particular to a method for removing ink marks on paper using laser light. Background technique [0002] Printed paper is the most commonly used carrier for recording information in people's lives. With the development of modernization, the emergence of digital printing technology makes the use of printing paper more and more. The paper industry is a traditional industry. Printing paper is an important carrier for disseminating and preserving culture and information knowledge, and is indispensable in life and office. [0003] According to the "2018 Annual Report of China's Paper Industry", in 2018, the production volume of paper and paperboard was 104.35 million tons, and the consumption volume was 104.39 million tons. Among them, the production of printing paper is 24.55 million tons, the consumption is 23.55 million tons, and the per capita annual consumption is 16.88 kg (1.395 billion people...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/362
CPCB23K26/362
Inventor 刘志峰刘威豪黄海鸿
Owner HEFEI UNIV OF TECH